微信小程序input输入框

1.实现input框只能用来传值，不能写数据的办法，是直接让disabled="true"就可以了

<input id='name' disabled="true" name="uname" placeholder='请输入' placeholder-class='name'></input>

2.input隐藏，直接让hidden="true"就好啦

<input name='url' hidden="true" maxlength="255" placeholder="{{placeholder}}"/>

3.改变input输入框的字体颜色（默认是灰色的），加上placeholder-class="placeholderStyle"

/* index.wxml*/

<input class="username" value="{{username}}" bindinput="bindUsernameInput" placeholder-class="placeholderStyle" placeholder="请输入密码" auto-focus />

/* index.wxss*/.placeholderStyle{color: cornflowerblue;}